Postal Code 78420
Carrières-sur-Seine · Yvelines, Île-de-France
78420 is the postal code of Carrières-sur-Seine in Yvelines, Île-de-France, France.
- Postal Code
- 78420
- Department
- Yvelines
- Region
- Île-de-France
- Country
- France
Place with postal code 78420
| Place | Sub-district | Department | Location |
|---|---|---|---|
| Carrières-sur-Seine | Saint-Germain-en-Laye | Yvelines | 48.907, 2.179 |
Near Paris
The nearest major city is Paris, about 14 km away.
Nearby postal codes
Frequently asked questions
Which places use postal code 78420?
Carrières-sur-Seine.
Which department and region is 78420 in?
Yvelines, Île-de-France, France.
What is the nearest major city to 78420?
Paris, about 14 km away.
Source: GeoNames postal codes (CC BY 4.0), geonames.org, retrieved 2026-10-22. Place coordinates are approximate. Check with the national postal service before sending anything valuable.